I believe there was a reference to the Kusanagi sword being female, or at least sentient.

Spoiler for V7:

As Godou evaded the Great Sage's attacks, he heard a mocking voice.
...Finally asking me for help? What a troublesome man.
An ice-cold feeling was dwelling in his right arm as the sword he had lent out just now returned to him. Now was the time to use the new weapon that had been waiting patiently to make an entrance.